Given the task definition and input, reply with output. In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

A respirator is a device designed to protect the wearer from inhaling hazardous atmospheres , including particulate matter such as dusts and airborne microorganisms , as well as hazardous fumes , vapours and gases .

A respirator is a kind of mask that is used to protect someone from breathing in dusts , fumes , or gases that might hurt them .